1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Reptile [31]
3 years ago
10

In which type of chemical reaction do two or more substances combine to form one substance?

Chemistry
2 answers:
WINSTONCH [101]3 years ago
6 0

Explanation:

A reaction in which two or more substances combine together to form a single product is known as synthesis reaction.

For example, C + O_{2} \rightarrow CO_{2}

     or,        H_{2} + \frac{1}{2}O_{2} \rightarrow H_{2}O

During synthesis reaction, heat or light are released in the form of energy. Therefore, synthesis reactions are exothermic in nature.

pishuonlain [190]3 years ago
4 0
The answer is 
synthesis 
You might be interested in
If the H3O is 4.950 x 10-12 what is the ph?
romanna [79]

Answer:

pH = 11.3

Explanation:

From the question given above, the following data were obtained:

Concentration of hydronium ion [H₃O⁺] = 4.950×10¯¹² M

pH =.?

The pH of a solution is defined by the following equation:

pH = –Log [H₃O⁺]

Thus, with the above formula, we can obtain the pH of the solution as follow:

Concentration of hydronium ion [H₃O⁺] = 4.950×10¯¹² M

pH =.?

pH = –Log [H₃O⁺]

pH = –Log 4.950×10¯¹²

pH = 11.3

8 0
3 years ago
Thermal energy is what we call energy that come from ___ of matter
kvv77 [185]

Answer:

Thermal energy is a kinetic form of energy that comes from the <u>temperature </u>of matter

Explanation:

3 0
2 years ago
Read 2 more answers
Indicate the number of significant figures in the measured number 0.0020 <br> A. 4<br> B. 5<br> C. 2
Sergio [31]

<u>Answer:</u>

The correct answer option is C. 2.

<u>Explanation:</u>

We are given the number '0.0020' and we are to indicate the number of significant figures in the given measured number.

According to the rules of significant figures, numbers that are non-zero, zeros between any two significant numbers and the ending zeros in the decimal position are categorized as significant figures.

Since there is one non-zero number and one ending zero in the decimal position, therefore 0.0020 has 2 significant figures.

6 0
3 years ago
The ph of a solution prepared by mixing 45.0 ml of 0.183 m koh and 35.0 ml of 0.145 m hcl is ________.
Naddika [18.5K]

Answer:

12.6.

Explanation:

  • We should calculate the no. of millimoles of KOH and HCl:

no. of millimoles of KOH = (MV)KOH = (0.183 M)(45.0 mL) = 8.235 mmol.

no. of millimoles of HCl = (MV)HCl = (0.145 M)(35.0 mL) = 5.075 mmol.

  • It is clear that the no. of millimoles of KOH is higher than that of HCl:

So,

[OH⁻] = [(no. of millimoles of KOH) - (no. of millimoles of HCl)] / (V total) = (8.235 mmol - 5.075 mmol) / (80.0 mL) = 0.395 M.

∵ pOH = -log[OH⁻]

∴ pOH = -log(0.395 M) = 1.4.

∵ pH + pOH = 14.

∴ pH = 14 - pOH = 14 - 1.4 = 12.6.

4 0
3 years ago
What is the molarity of 6 moles (mol) of NaCl dissolved in 2 L of water?
Mama L [17]

Answer:

C:  \frac{6 mol}{2 L}

Explanation:

we can use the molarity equation

M = \frac{mol}{L}

so to find M we plug in what we know, which is 6 moles of NaCl and 2 L of water, which gives us:

\frac{6 mol}{2 L}

8 0
2 years ago
Other questions:
  • Find the ΔG° for the combustion of half a mole of glucose C6H12O6 in kJ
    14·1 answer
  • Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 1.30 MJ o
    5·2 answers
  • Dicing potatoes is a physical change. true or false?
    13·2 answers
  • A sample of seawater contains 1.3 g of calcium ions in 3,100 kg of solution. what is the calcium ion concentration of this solut
    5·1 answer
  • Complete combustion of a 0.350 g sample of a compound in a bomb calorimeter releases 14.0 kJ of heat. The bomb calorimeter has a
    9·2 answers
  • What is the mass of 2.13 moles of lithium arsenate
    5·1 answer
  • At the beginning of the experiment, the aspirin pill contains 325 mg of acetylsalicylic acid and weighs 400 mg. at the end of ex
    8·1 answer
  • Which of the following is an example of a physical change?
    13·1 answer
  • Surface water is found in oceans, lakes, reservoirs, streams, rivers,and glaciers. Lakes, rivers, and reservoirs are where human
    8·1 answer
  • Which fact is NOT true about gravity?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!